3-氨基-6-甲氧基噻吩并[2,3-b]喹啉-2-羧酸甲酯的合成工艺研究

目的优化3-氨基-6-甲氧基噻吩并[2,3-b]喹啉-2-羧酸甲酯的合成工艺。方法以对甲氧基乙酰苯胺为原料,经过构建喹啉环、氰基化、硫化、构建噻吩环4步反应制备目标化合物,并优化各步反应条件。结果与结论目标化合物的结构经1H-NMR、13C-NMR和ESI-MS谱确证,总收率为67.3%(以对甲氧基乙酰苯胺计),优化后的工艺路线具有收率高、操作简单、污染低、适合大量制备等优点。     

2-取代-4-氨基噻吩并[3,2-d]嘧啶类化合物的合成及抗增殖活性

目的设计并合成2-取代-4-氨基噻吩并[3,2-d]嘧啶类化合物,评价其体外抗增殖活性。方法以3-氨基-2-噻吩甲酸甲酯为起始原料,经6步反应合成目标化合物;以CP-31398为阳性对照药,采用MTT[3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide]法测定了目标化合物对肿瘤细胞株H-460和HT-29的抗增殖活性。结果与结论合成16个未见文献报道的化合物,其结构经1H-NMR、MS确证;5个化合物显示较好的抗增殖活性,其中,化合物8n活性突出,为CP-31398的4-5倍。     

米罗那非的合成工艺改进

目的改进米罗那非的合成工艺。方法以2-羟基苯甲酸甲酯为原料,经醚化、氯磺化、N-酰化得到中间体2-丙氧基-5-[[4-(2-羟乙基)-1-哌嗪基]磺酰基]苯甲酸甲酯,水解后与4-丙基-1-苄基-3-氨基-1H-吡咯-2-甲酰胺发生酰化反应,再经O-乙酰化、N-脱苄基、N-乙基化、酯水解"一锅法"得到1-乙基-4-丙基-3-[5-[[4-(2-羟乙基)-1-哌嗪基]磺酰]-2-丙氧基苯甲酰胺基]-1H-吡咯-2-甲酰胺,最后经环合生成米罗那非。关键中间体4-丙基-1-苄基-3-氨基-1H-吡咯-2-甲酰胺的合成以甘氨酸为原料,经甲酯化、还原胺化、烯胺化、氨解、环合反应得到。结果与结论经5步反应合成目标化合物,收率为25.9%(以2-羟基苯甲酸甲酯计)。关键中间体经6步反应合成,收率为36.5%,目标化合物和中间体的结构经1H-NMR和MS谱确证。     

4H-吡啶并[1,2-a]嘧啶-4-酮取代的双芳基脲类化合物的合成及抗增殖活性

目的设计合成4H-吡啶并[1,2-a]嘧啶-4-酮取代的双芳基脲类化合物,初步评价其体外抗增殖活性。方法以2-氨基吡啶或2-氨基-4-甲基吡啶为原料,经环合、烃化、还原及酰化共4步反应合成目标化合物;以sorafenib为阳性对照,采用MTT法,测试目标化合物对乳腺癌细胞株MDA-MB-231的抗增殖活性。结果与结论合成了16个未见报道的含4H-吡啶并[1,2-a]嘧啶-4-酮药效团的双芳基脲类化合物,其结构经1H-NMR和MS确证;8个化合物显示较好的体外活性,其中,化合物4h活性突出,为sorafenib的8.3倍。     

1,4-二氢噻吩并[3',2':5,6]噻喃并[4,3-c]吡唑-3-羧酸衍生物的合成及抗癌活性研究(英文)

本文以2-巯基噻吩为原料,经6步反应合成了5个1,4-二氢噻吩并[3',2':5,6]噻喃并[4,3-c]吡唑-3-羧酸衍生物,并采用人乳腺癌细胞MCF-7对目标化合物的抗肿瘤活性进行初步评价。所合成化合物在100μM浓度下均有一定的抑制MCF-7活性。     

2-氧代-5,6,7,7a-四氢噻吩并[3,2-c]吡啶的合成

N-乙氧羰基-4-哌啶酮经Vilsmerier氯化甲酰化反应、在碳酸钾作用下与巯基乙酸乙酯环合制得6,7-二氧-4H-噻吩并[3,2-c]吡啶-2,5-二羧酸二乙酯(4),再经肼解、叠氮化、重排及脱保护反应制得2-氨基-6,7-二氢-4H-噻吩并[3,2-c]吡啶-5-羧酸乙酯盐酸盐(8),8经重氮化、水解后再由氢氧化钾碱解、成盐,制得普拉格雷的关键中间体2-氧代-5,6,7,7a-四氢噻吩并[3,2-c]毗啶,总收率约25％.     

1-苯氨基-5H-哒嗪并[4,5-b]吲哚类化合物的设计、合成及体外抗肿瘤活性

目的设计并合成1-苯氨基-5H-哒嗪并[4,5-b]吲哚类化合物,评价其抗肿瘤活性。方法以5-乙酰氧基-6-溴-2-溴甲基-1-环丙基-1H-吲哚-3-羧酸乙酯为起始原料,经多步反应合成目标化合物。采用MTT法,gefitinib为阳性对照药,以Bel-7402和HT-1080为测试细胞株对目标化合物抗肿瘤活性进行进行检测。结果合成了8个未见文献报道的新化合物,其结构经1H-NMR和MS确证。体外活性实验表明：多种化合物显示良好的抗肿瘤活性,其中化合物10f对Bel-7402和HT-1080肿瘤细胞株的抑制作用分别是阳性对照药gefitinib的6倍和7倍。结论1-苯氨基的苯环上的取代基和1-苯氨基-5H-哒嗪并[4,5-b]吲哚的8位引入的3-[[5-（脂肪（环）胺甲基）呋喃-2-基]甲硫基]丙氧基中脂肪（环）氨的种类均显著影响化合物的活性。     

3-芳基-6-(溴代芳甲基)-7H-噻唑并[3,2-b]-1,2,4-三嗪-7-酮类化合物的设计、合成及其乙酰胆碱酯酶抑制活性研究

目的设计合成3-芳基-6-(溴代芳甲基)-7H-噻唑并[3,2-b]-1,2,4-三嗪-7-酮类化合物,并探讨C-6位芳甲基上引入溴原子对其乙酰胆碱酯酶抑制活性的影响。方法以4-羟基苯甲醛为原料,经溴代反应,得到3-溴-4-羟基苯甲醛和3,5-二溴-4-羟基苯甲醛,再将溴代的4-羟基苯甲醛与乙酰甘氨酸经Erlenmeyer-Plchl反应、水解反应、缩合反应合成目标化合物3-芳基-6-(溴代芳甲基)-7H-噻唑并[3,2-b]-1,2,4-三嗪-7-酮类化合物。采用Ellman法对目标化合物进行体外乙酰胆碱酯酶抑制活性筛选。结果所有目标化合物的结构均经红外光谱、质谱和核磁共振氢谱确证。目标化合物经体外乙酰胆碱酯酶抑制活性筛选,结果显示:所有目标化合物均具有乙酰胆碱酯酶抑制活性,其中8个化合物在10μmol.L-1浓度水平抑制活性超过了40%。结论在7H-噻唑并[3,2-b]-1,2,4-三嗪-7-酮类化合物母核C-6位芳甲基中引入溴原子的3-芳基-6-(溴代芳甲基)-7H-噻唑并[3,2-b]-1,2,4-三嗪-7-酮类化合物普遍具有较高的AChE抑制活性,并且引入2个溴原子的化合物抑制活性明显高于引入1个溴原子的化合物。     

4-［2-(2-氨基-4，7-二氢-4-氧-1H-吡咯［2，3-d］嘧啶-5-基)乙基］苯甲酸的中试生产

目的:研究培美曲塞二钠的关键中间体4-[2-(2-氨基-4,7-二氢-4-氧-1H-吡咯[2,3-d]嘧啶-5-基)乙基]苯甲酸的放大生产.方法: 以对碘苯甲酸甲酯为起始原料,经缩合、溴代、环合、水解等反应得到制备培美曲塞二钠的关键中间体.结果:总收率约36.8%,本方法操作简单,收率稳定,适合工业化生产.     

奥氮平原料药中相关杂质的合成及结构鉴定

目的合成奥氮平原料药中的相关杂质并进行结构鉴定。方法分别以奥氮平的合成中间体4-氨基-2-甲基-10H-噻吩并[2,3-b][1,5]苯二氮杂艹卓盐酸盐和奥氮平为起始原料合成奥氮平的3个相关杂质:2-甲基-10H-噻吩并[2,3-b][1,5]苯二氮杂艹卓-4-(5H)-酮(1)、1-氯甲基-1-甲基-4-(2-甲基-10H-苯并[b]噻吩并[2,3-e][1,4]二氮杂艹卓-4-哌嗪基)-1-氯化物(2)和2-甲基-4-(4-甲基-1-哌嗪基)-10H-苯并[b]噻吩并[2,3-e][1,4]二氮杂艹卓4’-N-氧化物(3)。结果与结论合成并鉴定了奥氮平质量标准中提及的3种杂质,其结构经1H-NMR、13C-NMR谱及高分辨质谱确证;并且探讨了3种杂质可能的产生途径,以期为奥氮平的质量研究和相关杂质的控制提供帮助。     

阿哌沙班的合成工艺改进研究

目的对阿哌沙班的合成工艺进行改进研究。方法以4,5,6,7-四氢-1-(4-甲氧基苯基)-6-(4-硝基苯基)-7-氧代-1H-吡唑并[3,4-C]吡啶-3-羧酸乙酯为起始原料,通过还原、取代、环合、胺化反应得到阿哌沙班。结果合成了目标化合物阿哌沙班,经MS、~1H-NMR确证了结构,质量分数为99.2%,本合成工艺的总收率为76.4%。结论该合成工艺改进后操作简单、安全,适合工业化生产。     

Thiophene as a structural element of physiologically active compounds, I: Synthesis of derivatives of 4-thieno[2,3-b]-pyrroleacetic acid (author's transl)]

Thiophene as a Structural Element of Physiologically Active Compounds, I: Synthesis of Derivatives of 4-Thieno[2,3-b]-pyrroleacetic Acid The synthesis of derivatives of 4-thieno[2,3-b]pyrroleacetic acid via Fischer indole cyclization of t-BOC protected 2-hydrazinothiophenes 1 is described.     

Synthesis and pharmacological evaluation of newer thiazolo [3,2-a] pyrimidines for anti-inflammatory and antinociceptive activity

A new series of thiazolo [3,2-a] pyrimidine derivatives was designed and synthesized using 4-fluoroaniline and ethylacetoacetate as starting material. Anti-inflammatory activity was assessed by the rat paw edema method and antinociceptive activity was evaluated by thermal stimulus technique. The compounds 5-(4-chlorophenyl)-2-(4-fluorobenzylidene)-7-methyl-3-oxo-2,3-dihydro-5H-thiazolo[3,2-a]pyrimidine-6-carboxylic acid (4-fluorophenyl)amide (3l) and 2-(4-chlorobenzylidene)-5-(4-fluorophenyl)-7-methyl-3-oxo-2,3-dihydro-5H-thiazolo[3,2-a]pyrimidine-6-carboxylic acid (4-fluorophenyl)amide (3q) were found to possess significant anti-inflammatory and antinociceptive activities. These compounds also showed lower ulcerogenic activity and higher ALD₅₀ values. Compounds with an aryl ring substituted with a smaller electron withdrawing group at the fourth position displayed better activity than the other derivatives.     

Ring transformation of pyrrolidine-enaminothiones to 4,5-dihydro-6H-thieno[2,3-c]azepines

Transformation of Pyrrolidine Enaminothiones to 4,5-Dihydro-6H-thieno[2,3-c]azepines Addition of the pyrrolidine enaminothiones 1 with a semicyclic C? C bond to α-bromocarbonyl derivatives leads to the 4,5-dihydro-6H-thieno[2,3-c]azepines 6 which were characterized by their spectroscopic data. The thienozepine system is formed under basic conditions from a spiro intermediate. Three of the dihydrothienoazepines 6 and the thienoazocine 10 where tested for antiinflammatory activity.     

Pyrrolo(2,3-c)quinolines and pyrrolo(3,4-d)quinolines--synthesis and investigation of lipoxygenase inhibition

The Paal-Knorr synthesis of the cyclic hemiketonacetal 4 yields the pyrrole-2,4-dicarboxylic acid diesters 1c and 7 via the cyclic hemiaminals 5 and 6; while the pyrrole-2-carboxylic acid ester 9 is formed from the 1,4-diketon 10. Under reducing conditions 1c and their 4-carboxylic acid 8 give the pyrrolo[3,4-c]quinoline carboxylic acid ester 2a; the cyclic hydroxamic acid 11 and the lactam 12 of the pyrrolo[2,3-c]quinoline type are obtained from compound 9. The isomeric compounds of the pyrrolo[3,4-c]quinoline series 16, 17 and 18, respectively, are synthesized from the pyrroles 14 and 15; the cyclic hemiacetal 13 was used as educt. The tricyclic hydroxamic acids 16 and 17 weakly inhibit the 5-lipoxygenase (IC50 > 10 microM, relating to the formation of LTB4 of human whole blood).     

N-3，4，6，7-四氢-2H-取代嘧啶并[1，6-c]喹唑啉-2-烯胺类衍生物的合成及其体外抗肿瘤活性研究

目的合成N-3,4,6,7-四氢-2H-取代嘧啶并[1,6-c]喹唑啉-2-烯胺类衍生物,并对其进行体外抗肿瘤活性研究。方法以4,6-二氯嘧啶和6-氨基-1,4-苯并二氧杂环为起始原料,经过氨化、Suzuki偶联、缩合反应和环合反应合成一系列N-3,4,6,7-四氢-2H-取代嘧啶并[1,6-c]喹唑啉-2-烯胺类化合物,并采用MTT法对其体外肿瘤活性进行研究。结果设计并合成了18个目标化合物,结构经~1H-NMR和MS确证。活性测试结果显示多个目标化合物抗肿瘤活性与阳性对照药索拉非尼相近。结论发现了一类全新结构的骨架分子,目标化合物具有较强的抗肿瘤活性,为新型抗肿瘤化合物的设计与合成提供思路。     

Synthesis of imidazo[2,1-b]thiazoles as herbicides

A series of imidazo[2,1-b]thiazoles bearing halogens or a sulfonylurea group or an imidazolidone group, were synthesized and subjected to pre- and post-emergence herbicidal tests. 5-Bromo-6-(3-pyridyl)-2,3-dihydroimidazo[2,1-b]thiazole (4e) and 6-(2,3,4-trichlorophenyl)-2,3-dihydroimidazo[2,1-b]thiazole-5-carboxylic acid (8b) showed moderate activity in the post-emergence herbicidal tests only.     

Synthesis and biological activity of condensed derivatives of thieno[3,2-<Emphasis Type="Italic">d</Emphasis>]thiazolo(thiazino,thiazepino)[3,2-<Emphasis Type="Italic">a</Emphasis>]pyrimidines

Methods for the synthesis of new heterosystems including condensed pyrano[4′,3′:4,5]pyrido[2,3-b]-thieno[3,2-d]thiazolo(thiazino, thiazepino)[3,2-a]pyrimidines, thiazolo(thiazino, thiazepino)[3″,2″:1′,2′]pyrimido[4′,5′:4,5]thieno[2,3-c]isoquinolines, and cyclopenta[4′,3′:4,5]pyrido[2,3-b]thieno[3,2-d]thiazolo(thiazino)[3,2-a]pyrimidines are developed. The synthesis is carried out on the basis of 1-amino-2-ethoxycarbonylpyrano[4,3-d]thieno[2,3-b]pyridines and -thieno[2,3-b]isoquinolines. Antitumor and anticonvulsant properties of the synthesized products have been evaluated. Compounds possessing low toxicity and moderate biological activity are found. Translated from Khimiko-Farmatsevticheskii Zhurnal, Vol. 43, No. 3, pp. 17–21, March, 2009.     

Biological evaluation of novel 1,4-dithiine derivatives as potential antimicrobial agents

The preparation of twelve aminoalkanol derivatives of 2,3-dihydro-5H-[1,4]dithiino[2,3-c]pyrrole-5,7(6H)-dione was described. Newly obtained compounds, as well as their propyl and butyl analogues, were evaluated in vitro against selected viruses. Selected derivatives were tested for their antibacterial and antifungal activity. Compounds 3h, 3j, 4b and 5a–d showed moderate to significant protections against CVB-2, HSV-1 and YFV viruses. The molecular structures of 4a, 5c and 5g were determined by an X-ray analysis.     

Condensed Heterocyclic Compounds: Synthesis and Antiinflammatory Activity of Novel Thiazolo[3,2-a]pyrimidines

In this study, thirty six new 2-benzylidene-7-methyl-3-oxo-5-phenyl-2,3-dihydro-5H-thiazolo[3,2-a]pyrimidine-6-carboxylic acid methyl esters were synthesized and characterized by spectral, crystallographic, and elemental analysis. The antiinflammatory activity of the compounds was tested by the carrageenan hind paw edema test. It was found that compound 6a having a 2-methoxyphenyl group at position 5 and a benzylidene group at position 2 was the most potent compound in this series. All the compounds that were tested for ulcer activity gave positive results.